Explanipedia

Surface-laid pipelines and cables in areas of sand waves and seabed mobility: quantitative analysis from a decade of field observations Open

Zhechen Hou, M. F. Bransby, David White, P. Watson, Andrew Rathbone , et al. · 2025

Interpretative framework for CPT p-y module tests in drained sands: a practical model for end effect elimination considering sand relative density and surcharge pressure Open

Kai Wen, David White, Benjamin Cerfontaine, Susan Gourvenec, Andrea Diambra · 2025

Accelerating the current timeline of offshore wind projects is imperative to achieve global decarbonisation plans. In response, a novel in-situ site characterisation tool ROBOCONE is being developed to make the geotechnical design of offsh…

Assessment of near-surface undrained shear strength of soft seabeds with free fall cone penetrometer testing in the northern Baltic Sea Open

Maarit Saresma, David White, Debasis Mohapatra, Saeideh Mohammadi, Wojciech T. Sołowski , et al. · 2025

Free fall cone penetrometer testing (FFCPT) allows for efficient site reconnaissance and soft seabed undrained shear strength (s_u) assessment in a shallow water environment. The FFCPT is a particularly useful tool for near-surfa…

An evaluation of <i>p</i>–<i>y</i> curves for fatigue analysis of offshore piles and conductors Open

M. Guevara, James Doherty, P. Watson, David White · 2025

The paper evaluates methods for deriving p– y curves for fatigue analysis of slender piles and conductors. Updated ISO standard guidance is compared to a new approach, which is validated by centrifuge tests and based on laboratory measurem…

A surrogate model to efficiently predict changing strength and stiffness of soft soils through whole-life episodic cyclic loading Open

Noor Laham, Katherine Kwa, David White, Susan Gourvenec · 2024

The reliability of pre-deformation to control lateral buckling of pipelines: An evaluation based on observed embedment trends Open

Jayden Chee, P. Watson, David White, A.C. Walker · 2024

Pre-deformation of a pipeline into a continuous sinusoidal wave-like form has been shown to be effective at controlling lateral buckling of subsea pipelines due to a substantially lower axial stiffness and the limiting of maximum strain at…

Lateral bearing factors and elastic stiffness factors for robotic CPT p-y module in undrained clay Open

Kai Wen, Benjamin Cerfontaine, David White, Susan Gourvenec, Andrea Diambra · 2024

There is a strong incentive to enhance in-situ ground characterisation tools to provide additional data that supports early infrastructure design in engineering projects, prior to completion of laboratory element testing on borehole sample…

On Colimits and Model Structures in Various Categories of Manifolds Open

David White · 2024

After explaining the importance of model categories in abstract homotopy theory, we provide concrete examples demonstrating that various categories of manifolds do not have all finite colimits, and hence cannot be model categories. We then…

Understanding the behaviour of a new robotic device for next-generation site investigation: A 3D DEM Exploration Open

Sathwik Kasyap Sarvadevabhatla, David Igoe, Benjamin Cerfontaine, Andrea Diambra, David White · 2023

Accelerating advancements in robotic engineering provide an opportunity for developing economical and efficient site characterisation devices, particularly for critical offshore applications. A new intelligent robotic device, ROBOCONE (Fig…

A methodology to calibrate the PICSI cyclic p-y model using experimental results and optimisation Open

M. Guevara, James Doherty, P. Watson, David White · 2023

Fatigue life estimation of the components of a drilling conductor system is often a critical design consideration. The analysis is usually performed using a coupled system, with the soil-conductor interaction modelled using p-y springs tha…

p-y curves from in-situ ROBOCONE tests: a similarity approach for laterally loaded piles in clay Open

Abigail H. Bateman, George Mylonakis, J. Creasey, Ahmad El Hajjar, David White , et al. · 2023

The design of offshore piles requires assessment of the lateral load-displacement response, achieved using lateral nonlinear springs (p-y curves) distributed along the pile [1]. Specifically, a p-y curve describes the horizontal displaceme…

Dynamic seabed-anchor capacity enhancements for taut-moored floating offshore wind Open

Katherine Kwa, David White, Oscar Festa, Susan Gourvenec · 2023

Decarbonisation of global energy supply to meet Net Zero targets by 2050 requires rapid expansion of offshore wind [4]. Much of this growth will come from floating offshore wind (FOW) technology where seabeds are less congested, high energ…

Whole-life modelling of anchor capacity for floating systems: The RSN CSI approach Open

Katherine Kwa, David White, T. Tosdevin, Siya Jin, Deborah Greaves · 2023

Successive episodes of cyclic loading cause the strength of soft soils to reduce, through pore pressure build-up, and then recover, through consolidation, as shown by model testing, field studies and theoretical considerations. These ‘whol…

DEM study of particle scale effect on plain and rotary jacked pile behaviour in granular materials Open

Benjamin Cerfontaine, Matteo Oryem Ciantia, Michael Brown, David White, Yaseen Sharif · 2023

The capacity of open-ended piles strongly depends on the potential plugging occurring during installation. The Discrete Element Method (DEM) is particularly suitable to the study of pile plugging, as it can model large soil deformation. Ho…

Finding space for offshore wind to support net zero: A methodology to assess spatial constraints and future scenarios, illustrated by a UK case study Open

Hugo Putuhena, David White, Susan Gourvenec, Fraser Sturt · 2023

Government and commercial forecasts indicate global ambitions for 2000 GW of installed offshore wind (OW) by 2050 to meet the targets of the Paris Agreement. Set against a current global installed capacity of 56 GW offshore wind, which has…

Table of Contents Open

Adeera Levin, Ikechi G. Okpechi, Fergus Caskey, Chih‐Wei Yang, Marcello Tonelli , et al. · 2023

A comparative field study of free-fall cone and sphere penetrometers in soft sediment Open

Shiao Huey Chow, Conleth O’Loughlin, C.L.V. Goh, R. McIlduff, David White , et al. · 2023

The offshore renewables industry may be better served by new bespoke design guidelines than by automatic adoption of recommended practices developed for oil and gas infrastructure: A recommendation illustrated by subsea cable design Open

Terry Griffiths, Scott Draper, Liang Cheng, Hongwei An, Marie‐Lise Schläppy , et al. · 2023

Introduction There is an emerging need for the offshore renewable industry to have their own bespoke design guidelines because the associated projects and offshore facilities differ in fundamental ways to oil and gas facilities. Offshore r…

Anchor geotechnics for floating offshore wind: Current technologies and future innovations Open

Benjamin Cerfontaine, David White, Katherine Kwa, Susan Gourvenec, Jonathan Knappett , et al. · 2023

Numerical modelling of plate anchors under sustained load: The enhancement of capacity from consolidation Open

Katherine Kwa, David White · 2023

Embedded plate anchors can be used to moor floating offshore facilities. In taut mooring systems, a sustained tension carried by the anchors affects their long-term capacity due to consolidation effects in the soil surrounding the anchor. …

Modification of UV absorption profile of polymer film reflectors to increase solar-weighted reflectance Open

G. Jörgensen, Randall C. Gee, David White · 2023

Provided are reflective thin film constructions including a reduced number of layers, which provides for increased solar-weighted hemispherical reflectance and durability. Reflective films include those comprising an ultraviolet absorbing …

Pyramidal space frame and associated methods Open

Ryan Michael Clark, David White, Jr Farr · 2023

A space frame having a high torsional strength comprising a first square bipyramid and two planar structures extending outward from an apex of the first square bipyramid to form a "V" shape is disclosed. Some embodiments comprise a plurali…

UK perspective research landscape for offshore renewable energy and its role in delivering Net Zero Open

Deborah Greaves, Siya Jin, Puiwah Wong, David White, Henry Jeffrey , et al. · 2022

This paper sets out the role of offshore renewable energy (ORE) in UK targets for Net Zero greenhouse gas emissions by 2050 and provides a review of the research challenges that face the sector as it grows to meet these targets. The resear…

Development of a prototype autonomous inspection robot for offshore riser cables Open

Christopher Gotts, Benjamin D. Hall, Oliver Beaumont, Ziyang Chen, William D. Cleaver , et al. · 2022

The motion and large environmental loads experienced by riser cables connected to floating offshore wind turbines put them at higher risk of failure than grounded sections of cable. We propose an Autonomous Riser Inspection System (ARIS) t…

A review of the UK and British Channel Islands practical tidal stream energy resource Open

Daniel Coles, Athanasios Angeloudis, Deborah Greaves, Gordon D. Hastie, Matthew Lewis , et al. · 2021

This review provides a critical, multi-faceted assessment of the practical contribution tidal stream energy can make to the UK and British Channel Islands future energy mix. Evidence is presented that broadly supports the latest national-s…

A cyclic p-y model for the whole-life response of piles in soft clay Open

David White, James Doherty, M. Guevara, P. Watson · 2021

It is evident from model testing, field studies and theoretical considerations that the strength of a soft clay can reduce and then recover – potentially to above the initial value – as a result of cyclic loading followed by consolidation.…

Measurement of modulus of subgrade reaction for geogrid stabilized roadways Open

Prajwol Tamrakar, Mark H. Wayne, Garrett Fountain, David White, Pavana Vennapusa · 2021

Performance of rigid pavements depends primarily upon uniformity in the slab support condition and a composite response of unbound aggregate layers and subgrade. Several pavement design and analysis methods (e.g., AASHTO, PCA) consider mod…

Partially Mobile Shallow Subsea Foundations: A Practical Analysis Framework Open

Jinbo Chen, David White · 2021

The geotechnical design of partially mobile subsea foundations (mudmats) for pipeline/flowline end terminals (PLETs) is presented in this paper. A partially mobile mudmat represents a fit-for-purpose engineering solution that has significa…

An efficient and locking‐free material point method for three‐dimensional analysis with simplex elements Open

Lei Wang, William M. Coombs, Charles E. Augarde, Michael Cortis, Michael Brown , et al. · 2021

The Material Point Method is a relative newcomer to the world of solid mechanics modelling. Its key advantage is the ability to model problems having large deformations while being relatively close to standard finite element methods, howev…

Analysis of the added mass term in soil bearing capacity problems Open

Katherine Kwa, Gabriel D. Weymouth, David White, C. M. Martin · 2021

This technical note presents a simplified method for quantifying the added mass of the soil that is mobilised as part of the failure mechanism around a foundation during rapid loading, and the resulting additional soil resistance. This not…

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